Light-Absorbing Display Structure for Reflection Suppression
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Solution Overview
Problem
Existing display devices face issues with reflection of external and internal light, which affect visibility and image clarity.
Innovation Solution
Incorporation of a light absorbing layer that overlaps light emitting elements, allowing some light to be emitted upward while preventing reflection from conductive layers, by being disposed on the substrate and insulating layers, including a black matrix material to absorb visible wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light absorbing layer is introduced to prevent reflection, then visibility and image clarity are improved, but device structure becomes more complex
Solution Approach 1:
A light absorbing layer is introduced as an intermediary component between the light emitting element and the external environment. This layer selectively absorbs harmful reflected light while allowing useful light to pass through, thereby resolving the contradiction between improving visibility and maintaining structural simplicity
Solution Approach 2:
The light absorbing layer is constructed using composite material structures, including black matrix materials and alternating high-refractive-index and low-refractive-index layers. These composite structures enhance light absorption efficiency while optimizing the overall device performance
2Object-affected harmful factors
If a light absorbing layer is added to reduce reflection, then visibility is improved, but manufacturing process becomes more complex
Solution Approach 1:
The light absorbing layer is segmented into multiple functional sub-layers: a black matrix layer for primary light absorption, and alternating high-refractive-index and low-refractive-index layers for enhanced optical control. This segmentation allows each sub-layer to be optimized independently while simplifying the overall manufacturing process
Solution Approach 2:
Different regions of the light absorbing layer are assigned different optical properties. The black matrix material provides strong absorption in specific areas, while the refractive index layers provide controlled light management in other regions, allowing localized optimization without complicating the entire manufacturing process
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves visibility by reducing the reflection of internal and external light, enhancing image clarity and user experience.
Implementation Method 1
a light absorbing layer BM capable of allowing a part of light emitted from the light emitting element to be smoothly emitted upward, while preventing the other part thereof and external light from being reflected by conductive layers
Data Source
AI summary
A display device includes a buffer layer on a substrate and including an opening in a first region, a gate insulating layer on the buffer layer and including an opening in the first region, a first conductive layer on the gate insulating layer in a second region, a first interlayer insulating layer on the first conductive layer and including an opening in the first region, a second conductive layer on the first interlayer insulating layer in the second region, a light absorbing layer on the second conductive layer, a third conductive layer d on the light absorbing layer and including a first electrode and a second electrode, and a first voltage wire on the light absorbing layer, a first insulating layer overlapping the third conductive layer; and light emitting elements on the first insulating layer in the first region.